Selected MCQ

Current Question
Which phenomenon provides evidence that the universe is expanding?
  • A. Galactic collisions
  • B. Redshift of distant galaxies
  • C. Aurora borealis
  • D. Supernova explosions
Correct Answer: B
Explanation:
Edwin Hubble observed that distant galaxies are redshifted, indicating expansion.
Related Question 1
Which of these is a quantum phenomenon not present in classical bits?
  • A. Voltage
  • B. Entanglement
  • C. Resistance
  • D. Capacitance
Correct Answer: B
Explanation:
Quantum entanglement allows qubits to be correlated in ways impossible for classical bits.
Related Question 2
Which Mars rover first identified definitive evidence of past water on Mars?
  • A. Spirit
  • B. Opportunity
  • C. Curiosity
  • D. Sojourner
Correct Answer: B
Explanation:
Opportunity found strong evidence (hematite spheres) of ancient water on Mars.
Related Question 3
What phenomenon is being observed in gravitational wave astronomy?
  • A. Variations in Earth's gravity
  • B. Ripples in spacetime from massive events
  • C. Changes in ocean tides
  • D. Electromagnetic radiation
Correct Answer: B
Explanation:
Gravitational wave detectors observe ripples in spacetime from events such as black hole mergers.
Related Question 4
Which actuation method provides high force in a compact form, often used in heavy robots?
  • A. Electric motors
  • B. Hydraulic actuators
  • C. Pneumatic cylinders
  • D. Solenoids
Correct Answer: B
Explanation:
Hydraulic actuators provide high force and are common in heavy-duty robotics.
Related Question 5
Which service provides automated application security scanning against known vulnerabilities?
  • A. VPN
  • B. IDS (Intrusion Detection System)
  • C. WAF (Web Application Firewall)
  • D. Antivirus
Correct Answer: C
Explanation:
A Web Application Firewall (WAF) filters and monitors HTTP traffic for vulnerabilities like SQL injection.